Pusher ram for coke ovens



Oct. 8, 1929. c. B. COLLINS ET AL 1,730,604 PUSHER RAM FOR COKE OVENS Filed Jan. 2 1927 2 Sheets-Sheet 1 I H BY I I \i N 3 %/@Z ATTORNEY Patented Oct. 8, 1929 UNITED STATES rATE ToFHcE CARROLL B. COLLINS AND JAMES A. B. Lovn'r'r, or PITTSBURGH, PENNSYLVANiA, AS-

SIGNOBS T01 THE KOPPERS COMPANY, a oonrozaarron or DELAWARE PUSHER RAM FOR COKE OVENS Application filed January 29, 1927. Serial No. 184,394.

Our invention relates to pusher rams and it has particular relation to such devices as are employed in connection with the operation of coke ovens of the horizontal type.

One object of our invention is to provide a pusher ram that is effective in pushing coke from the coke ovens with minimum damage to the walls and floors thereof.

A further object of our invention is to provide a pusher ram which operates substantially without abrasion of the coke oven Walls when the ram is traveling through the oven.

A still further object of our invention is to provide a pusher ram which removes sub stantially all loose coke in its forward operation but permits coke spilled over during the pushing operation to remain on the oven floor when the ram is Withdrawn from the oven.

In the construction and operation of pusher rams, it has been the practice heretofore to provide a head for the ram that is rigid in construction and which operates to. actuate coke along the oven in both directions of its travel. The supporting shoes for such rams have been of such construction that any loose coke encountered by the shoes was crushed between the shoe and the wall or was carried along the floor of the oven with the consequent abrasion of the walls and floors.

In accordance with our present invention, we provide a pusher ram with a head so constructed that substantially all loose coke is actuated in the forward direction of its operation but which will permit loose coke that is spilled over during the pushing operation to remain on the oven floor when the ram is being withdrawn. 2

It is also a feature of our invention that the supporting shoe which bears on the floor of the oven is so arranged that any loosecoke that may be spilled over during the pushing operation is not carried along the floorof the oven nor crushed between the shoe and the walls. The shoe is so shaped that any loose coke encountered thereby is actuated up and along inclined portions of the shoe until the latter has assed thecoke without any substantial horizontal movement of the coke.

Our invention will be described in conneotion with the accompanying drawings, in which- Figure 1 is a view, partially in transverse section and partially in elevation, of a portion of a coke oven battery and an associated pusher machine embodying our invention;

Fig. 2 is an enlarged view, in side elevation, of a portion of the pusher ram of Fig. 1 and a portion of a coke oven floor, the latter being shown in section;

Fig. 3 is an end view of a portion of the head of the pusher ram, taken on line HTHI of Fig. 2, a portion of an associated coke oven being shown in section;

Fig. l is a'view, similar, to Fig. 3, taken on line TV-IV of Fig. 2; and

Fig. 5 is a diagonal sectional View of an end portion of the shoe, taken on. line VV 01" Fig. 2. i

Referring particularly to Fig. 1, a horizontal coke oven battery 1, only a portion of which is shown, comprises a coking chamher 2, within which is illustrated a charge of coal 3 to be coked. The coke oven 2 is pro-- vided, on its pusher side, with a detachable door 4 thatis removed when the coking oper ation is completed and the charge of coke is to be removed. The remaining details of the coke oven battery are not described, since they constitute no part of the present invention.

The coke over battery is provided with a pusher machine 6, which operates on rails 7 that parallel the'battery. The pusher machine 6 carries, at its top, a leveler bar 8 for leveling the charge ofcoal tobe coked. The pusher machine is alsoprovided with a pusher ram 10, by means of which the charge'ot coke is pushed horizontally from the oven at the end of the coking operation.

The pusher ram 10 comprises a longitudinal bar 11 that is provided with a transverse head 12 having a vertical face, the length of which is substantially equal to the heighth of the oven. A supymrting shoe 13, which is in the rear of the head 12, supports a portion of the weight of'the pusher ram when the latter is extended within the oven. The ram is driven by any suitahle driving mechanism, indicated at 14.

Reference may now be had to Figs. 2, 3, a and 5, in which the details of the pusher ram 10 are illustrated. The vertical head 12 is provided, at its bottom portion, with a pivotally mounted plate 15, that may be termed a flapper plate, that is adapted to swing in one direction only from the plane of the face of the head 12. The plate 15, which is of substantially inverted T-shape, is pivotally mounted at 16 and, when it is in its vertical position, engages shoulders 17 on a casting 18, by means of which it is supported. The shoulders 17 prevent rearward movement of the plate from its full-line position of Fig. 2. The plate 15 is provided with a rearwardly extending counterweight 19 that operates in a recess 20 that is cored out of the casting 18.

The shoe 13 comprises a member 21 having a substantially flat face portion for engaging the floor of the coke oven. The ends of the member 21 are tapered and are slightly bevelled on the bottom face thereof to provide a slight clearance between them and the oven floor. and to facilitate the sliding movement of the shoe over the floor of the oven. The upper surfaces of the end portions of the shoe are curved upwardly and toward the sides of the shoe in such manner that they are of substantially plow shape whereby any loose coke that may be encountered by the shoe in its travel through the oven tends to pass upwardly and to one side of the shoe without being actuated along the oven. The member 21 is secured to the bar 11 by means of a suitable casting 22 and bolts 23, the intermediate portions of the shoe being narrow relative to the member 21 and to the portion adjacent to the bar in order that coke may pass between the intermediate portion and the walls of the oven.

It may be assumed that the coal in the coke oven 2 has been coked and that it desired to push the charge from the oven. The door 4: and the corresponding door on the coke side are removed by the usual door machines and V alinement with the face of the head 12 and edge of the flapper plate 15 and the floor of the oven.

During the pushing operation, it is probable that a relatively small portion of coke may be spilled over the top of the head 12 and fall on the floor of the coke oven between the head 12 and the shoe 13. When this loose coke is encountered by the shoe 13, the pointed ends of the latter tend to actuate it to one side of the shoe, while the curved sides of plow shape tend to lift the coke from the floor whereby it may pass along the sides of the member 21 and be permitted to fall to the floor by the downwardly curving rear end of the member 21. This operation causes no substantial horizontal movement of the loose coke and the latter is not caused to damage either the side walls or the floor of the oven.

When the ram 10 has reached the end of its path of forward movement, the driving.

mechanism is reversed and the ram is withpass under the head 12 without dragging the coke along the floor of the oven'.

The pusher ram of our invention operates to remove substantially all coke in the path thereof during its forward operation, the face of the head being maintained in rigid alinement. The supporting shoe is arranged to pass through any loose coke that may spill over without crushing it between the walls or the floor. This action is obtained by reason of the end portions of plow shape withwhich the shoe is provided.

During the return movement of the pusher ram, the supporting shoe operates in the same way to pass through any loose coke Without material horizontal movement of the latter and theflapper plate of the head is freely movable to permit the loose coke to remain on the oven floor.

Accordingly, our improved pusher ram may operate without any serious damage to the walls and floor of the oven by reason of the absence of abrasion, due to the crushing or dragging of coke along the oven surfaces; Inasmuch as the materials of which coke ovens are constructed are relatively expensive and replacement and repair are quite diflicult, the importance of our invention will be readily appreciated.

We claim as our invention:

1. A pusher ram comprising a bar and a head extending transversely thereto, said head having a face portion and comprising a member mounted at the bottom of said head for pivotal movement on one side only of the plane of said face.

The flapper plate 15 2. A pusher ram for coke ovens comprising a head having a portion that is movable relatively to said head when the latter is moved in one direction, said movable portion having a counterweight for facilitating said relative movement. 7

3. A pusher ram comprising a bar and a head extending transversely thereto, said head having a face portion for engaging coke in a coke oven and having a member that is rigidly connected to said head when the latter is moved in one direction and is freely movable relatively thereto when the head is moved in the other direction.

4-. A pusher ram for coke ovens comprising a longitudinally movable bar and a head, said head having a pivotally mounted member at the lower portion thereof and constituting a part of the face portion of said head, said member being movable with said head in the forward direction of the latter and swinging freely to permit coke to pass the head when the latter is moved rearwardly.

5. A pusher ram comprising a supporting shoe having an engaging face portion with tapered and inclined end portions for permitting its passage through loose coke without material actuation of the coke.

6. A pusher ram for coke ovens comprising a longitudinally movable bar and a supporting shoe connected thereto and having a substantially flat face portion for engaging the floor of a coke oven and a relatively narrow portion intermediate the face portion and the bar for permitting loose coke to pass adjacent to said narrow portion when the ram is moved through a coke oven.

7 A pusher ram for coke ovens comprising a bar and a supporting shoe therefor having arelatively wide bottom portion and a relatively narrow intermediate portion for per-- mitting loose coke to pass adjacent thereto when the ram is in operation in a coke oven.

8. A pusher ram for coke ovens comprising a longitudinally movable bar and a supporting shoe comprising a member having a substantially flat face portion for engaging the floor of a coke oven and connecting means comprising a relatively narrow portion between said member and said bar, said memher having tapered and inclined end portions whereby said shoe may readily pass through loose coke on the floor of said oven.

9. A pusher ram for coke ovens comprising a longitudinally movable bar and a sup porting shoe comprising a member having a substantially flat face portion for engaging the floor of a coke oven and means for connecting said member to said bar comprising a relatively narrow portion, said member having substantially pointed and upwardly inclined end portions whereby said shoe is permitted to pass through loose coke on the floor of said oven without material actuation of said coke. 

